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Magrathea News

15 June 2026

Magrathea and TETRA Achieve Technical Breakthrough in Production of Magnesium from Arkansas Brine

Through their Arkansas Magnesium joint venture, Magrathea and TETRA produced the first >99.9% pure primary magnesium metal meeting ASTM B92 specifications from Smackover brine in Arkansas.

Magrathea backed by $100M to rebuild American magnesium production

Magrathea secured fresh capital bringing total backing over $100M from private investors, government, and commercial partnerships, including a $24M Series A.

Magrathea and Wogen sign offtake distribution partnership with $10M working capital injection

Magrathea formed an offtake and distribution partnership with global metals trader Wogen, including a $10M working capital commitment to support commercialization.

Magrathea and TETRA sign term sheet for Arkansas joint venture

Magrathea signed a term sheet with TETRA Technologies to form a joint venture rebuilding America's magnesium metal defense industrial base at TETRA's Evergreen Project in Southwest Arkansas.

Magrathea meets purity targets for US Department of War

The US Department of War independently confirmed that Magrathea's pilot-scale magnesium metal meets the purity targets for its Defense Production Act Title III project.

Magrathea launches next-gen magnesium production technology, advances plans to scale

Magrathea launched its next-generation magnesium chloride electrolyzer at its Oakland pilot facility, a key step toward a scaled commercial plant.

Magrathea partners with global automaker

Magrathea partnered with a multinational automotive manufacturer that pre-purchased a percentage of its future demonstration plant product to deploy US-made light metal in vehicles.

Magrathea sells metal

Magrathea sold metal to its first customer from the first new electrolytic magnesium smelter designed, built, and operated on American soil in the 21st century.

Magrathea and Cargill sign brine supply agreement

Magrathea signed a brine supply agreement with Cargill, one of the world's leading salt producers, to supply seawater-derived feedstock for its pilot plant scale-up.

US Department of Defense forms $28M partnership with Magrathea

Magrathea formed a $28M public-private partnership with the US Department of Defense under Defense Production Act Title III to scale up domestic magnesium production.

Magrathea raises $10M seed round

Magrathea raised a $10M seed round co-led by VoLo Earth and Capricorn Investment Group, with backing from leading mining and technology investors.

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